› Lost Fathoms

what is Lost Fathoms?

Pilot a submarine with mouse controls, upgrade your lab, and uncover mysteries in a strategic idle game.

Lost Fathoms combines submarine simulation with strategic idle gameplay. Use mouse controls to navigate your submarine, research anomalies, and upgrade your lab to improve your vessel. The game features a narrative about mysterious signals and a limited time challenge.

It sits in the Idle / Strategy / Narrative corner of the genre. Like most idle games it runs on a simple loop — earn, reinvest, automate — but the depth is in how long that loop keeps unfolding. Expect to check in, make a few decisions, and watch the numbers climb whether you're at the keyboard or not.

New to incrementals? Read our beginner's guide first, or just hit play — these games are built to teach themselves.